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Samson MPL 1640, Owner'S Manual

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Samson MPL 1640 Owner'S Manual Download Page 26

24

Applications

Here are four suggested applications for the MPL 1640; bear in mind that your particular circumstance may dictate
changes in these suggested signal connections and routings.

Application 1 - Using the MPL 1640 as a main live mixer  

The main connections here involve routing the MPL 1640’s Main Mix output to the input of a power amplifier, and, from
there, to PA speakers.  Microphones and line level signals are connected to various channel inputs.  Signal processors
are connected to Aux sends and returns and to channel inserts as required.  The Main Mix inserts are connected to a
room equalizer.  Finally, a submix from Aux send 1 is connected to the input of a second power amplifier driving onstage
monitor speakers so that performers can receive a monitor mix independent of the house mix.

1

2

3

1

2

3

1

2

3

1

2

3

1

2

3

CH 1

CH 2

CH 3

CH 4

CH 5

CH 1

CH 2

CH 3

CH 4

CH 5

CH 6

CH 7

CH 8

CH 9

CH 10

CH 11

CH 12

CH 13

CH 14

CH 15

CH 16

ON

OFF

1

2

3

CH 6

1

2

3

CH 7

1

2

3

CH 8

1

2

3

CH 9

1

2

3

CH 10

CH 11

CH 12

CH 13

CH 14

CH 15

CH 16

115

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

ON

OFF

~115V /230V

50/60Hz 42W

MAIN MIX OUT

(BALANCED 600

Ω

 

+ 4dB)

P

O

W

E

R

PHANTOM

SERIAL

NUMBER

AVIS:

RISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR.

DO NOT EXPOSE THIS EQUIPMENT

TO RAIN OR MOISTURE.

XLR

1 GND
2    +
3    -

MPL 1640 

16 CHANNEL

AUDIO MIXER

TIP RING SLEEVE

TIP        +
RING     -

SLEEVE GND

ASSEMBLED IN R.O.K.

SAMSON TECHNOLOGIES CORP., NEW YORK, U.S.A.

SAMSON

L

CHANNEL INSERT

(TIP RETURN - RING SEND)

AUX 1

AUX 2

3L - 4R

MAIN MIX

R

L

AUX 3

AUX 3

AUX 2

AUX 1

AUX RETURN (UNBAL.2K

Ω

 

+ 4dB)

R

R

R

L

L

L

(BALANCED - 50dB TO + 4dB)

MIC INPUT

R

3L - 4R(UNBAL.2K

Ω 

+4dB)

BUS INSERT

AUX OUT

(UNBAL.2K

Ω 

+4dB)

LINE INPUT

(BALANCED 10 K

Ω 

- 40dB

 TO + 4dB)

SERVO - 240

SAMSON

SERVO - 240

SAMSON

20Hz

25Hz

31.5Hz

40Hz

50Hz

63Hz

80Hz

100Hz

125Hz

160Hz

200Hz

250Hz

315Hz

400Hz

500Hz

630Hz

800Hz

1Khz

1.25Khz

1.6Khz

2Khz

2.5Khz

3.15Khz

4Khz

5Khz

6.3Khz

8Khz

10Khz

12.5Khz

16Khz

20Khz

20Khz

16Khz

12.5Khz

10Khz

8Khz

6.3Khz

5Khz

4Khz

3.15Khz

2.5Khz

2Khz

1.6Khz

1.25Khz

1Khz

800Hz

630Hz

500Hz

400Hz

315Hz

250Hz

200Hz

160Hz

125Hz

100Hz

80Hz

63Hz

50Hz

40Hz

31.5Hz

25Hz

20Hz

+15db

0

-15db

0

+15db

-15db

-15db

+15db

0

+15db

-15db

0

SAMSON

1/3 OCTAVE DUAL 31 BAND GRAPHIC EQUALIZER

E62

POWER

BYPASS

BYPASS

PEAK

PEAK

AMPLIFIER

GRAPHIC EQUALIZER

SIGNAL PROCESSOR

STEREO AMPLIFIER

SIGNAL PROCESSOR

Summary of Contents for MPL 1640

Page 1: ......

Page 2: ...ding Techniques 15 Using Bus 3 4 17 Using Pan 18 Using Equalization 19 Using the Auxiliary Sends and Returns 20 Using Channel Inserts 21 Using PFL Solo 22 Changing the MPL 1640 from Rack mount to Tabletop 23 Applications 24 Using the MPL 1640 as a main live mixer 24 Using the MPL 1640 as an onstage monitor mixer 25 Using the MPL 1640 as a keyboard submixer 26 Using the MPL 1640 as a recording mixe...

Page 3: ...0 for both live performance and recording Oh and one last thing don t forget to fill out and mail in the enclosed warranty card This will enable you to receive online technical support and will allow us to send you updated information about this and other Samson products in the future SPECIAL NOTE Should your unit ever require servicing a Return Authorization number RA is necessary Without this nu...

Page 4: ...eo output faders Each is detented at its 0 unity gain position Peak input LEDs for each channel showing you when an input signal is overloading or near overloading these illuminate 5 dB prior to distortion Channel inserts for twelve of the sixteen channels enabling you to use out board signal processors such as outboard equalizers compressor limiters or noise gates in a standard effect loop In add...

Page 5: ...0 10 AUX 1 0 10 AUX 2 0 10 AUX 3 0 10 PEAK 4 50 INPUT TRIM 0 10 15 15 HIGH 0 12 12 MID 0 15 15 LOW 0 10 AUX 1 0 10 AUX 2 0 10 AUX 3 0 11 PEAK 10 4 50 INPUT TRIM 0 10 15 15 HIGH 0 12 12 MID 0 15 15 LOW 0 10 AUX 1 0 10 AUX 2 0 AUX 3 0 13 PEAK 10 4 50 INPUT TRIM 0 10 15 15 HIGH 0 12 12 MID 0 15 15 LOW 0 10 AUX 1 0 10 AUX 2 0 AUX 3 0 14 PEAK 10 4 50 INPUT TRIM 0 10 15 15 HIGH 0 12 12 MID 0 15 15 LOW 0...

Page 6: ...ices At the 0 posi tion the send signal is routed with unity gain that is no boost or attenuation As each knob is turned clockwise from the 0 position the signal is boosted as it is turned counterclockwise from the 0 position it is attenuated At the fully counterclockwise position the send signal is infinitely attenuated that is no signal is routed At the fully clockwise 10 position the send signa...

Page 7: ...Structure and Using Equalization sections on pages 12 and 19 for more information 8 Channel fader gray with a blue line This linear slider determines the signal level being sent to the main output as well as affecting the signal level being routed to Aux sends 2 and 3 which are post fader Aux 1 is always pre fader In practice you will use the channel faders to continuously adjust the levels of the...

Page 8: ...t signals for that Aux return are at equal strength When moved left of center the left input signal remains at the same strength but the right input signal is attenuated when the knob is moved right of center the right input signal remains at the same strength but the left input signal is attenu ated When placed fully counter clockwise only the left input signal is heard panned hard left when plac...

Page 9: ...hone preamp delivers 150 mw at 30 ohms 8 Main L R Faders white with blue line These linear sliders determine the relative level of the two Main Left Right outputs just prior to being sent to the rear panel Main Mix output jacks as described on page 8 The 0 detented position of each fader indicates unity gain no level boost or attenuation Moving the fader below this position towards the dB position...

Page 10: ...and less noise and hum if you use balanced lines See the Connecting the MPL 1640 section on page 10 for more information 6 3L 4R Out These are the MPL 1640 s secondary outputs The 3 4 Out jacks are unbalanced accepting standard two conductor 1 4 plugs For this reason it is generally preferable to use the Main Mix outputs when only two outputs are required See the Using Bus 3 4 section on page 17 f...

Page 11: ...rces such as synthesizers drum machines CD players tape decks or effects processors to any of the MPL 1640 s input channels All channel line input jacks are electronically balanced so you should use balanced three conductor cabling and plugs wherever possible unbalanced two conductor plugs can also be inserted into these inputs but you ll get better signal quality and less outside noise and hum if...

Page 12: ...h the MPL 1640 will accept unbalanced connectors throughout it specifically provides electronically balanced connectors for all sixteen mic and line inputs and for its Main Mix outputs The wiring diagram below shows how 1 4 TRS Tip Ring Sleeve plugs should be wired for use with these inputs and outputs Unbalanced cables use standard 1 4 phone plugs wired as follows Make one connection at a time an...

Page 13: ...s required For example in a recording situation Aux 1 is optimum for head phone cueing or for driving a secondary monitor such as a studio room monitor In live performance Aux 1 can be used to route signal to an onstage monitor system so that the signal the performers hear is indepen dent of the house mix Signals that are likely to require in line processing such as compression limiting or expansi...

Page 14: ...to establish the correct gain structure the key to getting the best performance from the MPL 1640 or from any mixer for that matter This is a simple procedure that ensures optimum input and output levels so that no unnecessary noise caused by too low a signal or overload distortion caused by too high a signal is created Here s a step by step description of how to do so a Turn off the MPL 1640 and ...

Page 15: ...equire rather more in the way of input trim boost than line inputs k If you have any outboard signal processors connected to the Aux send and return jacks on the rear panel follow this step Because outboard effects processors can sometimes be quite noisy it s particularly important to maxi mize the amount of signal being sent to them via the MPL 1640 Aux sends The idea is to drive these devices as...

Page 16: ...that something is distorting If you need to make adjustments to the over all level use the volume control of your power amplifier Because this procedure sets the optimum input gain of all channels it also sets the correct gain structure when using the MPL 1640 s alternative Bus 3 4 outputs Following this procedure if you opt to route a channel s signal to the Bus 3 4 outputs by pressing in that ch...

Page 17: ...rong plugs such as the one used by the MPL 1640 should always be used as is don t use adapters to lift the ground unless you re using a star ground network see below If you hear hum or buzz from a device that uses a two prong plug or an external two prong AC DC adapter you can try revers ing the plug in the socket If that doesn t work you may need to physically ground that device s chassis by conn...

Page 18: ...ectors so there is the possibility of danger if it is done incorrectly We strongly recommend that you contract with a qualified profes sional to carry out this or any kind of electrical work Another less common problem you may encounter is that of oscillation a ringing tone which apart from being annoying is potentially dangerous to your speak ers This is generally caused either by poor outside wi...

Page 19: ...g See the Applications section on page 24 of this manual for more information If no equipment is connected to the rear panel Bus 3 4 output jacks you can use the MPL 1640 Bus switches to mute particular channels that is remove them temporarily from the overall mix without having to change their fader position To do this all you have to do is press in that channel s Bus switch when you do so the si...

Page 20: ...itions In the stereo Auxiliary return section the Balance control allows you to adjust the relative levels of the signals arriving at the left and right inputs In Aux returns where both inputs are connected the left signal is automatically panned hard left and the right signal is automatically panned hard right The Balance knob con trols the relative levels of the paired input signals When the kno...

Page 21: ...e frequencies both above and below the specified area are affected In most instances the best way to approach equalization is to think in terms of which frequency areas you need to attenuate as opposed to which ones you need to boost boosting a frequency area also has the effect of boosting the overall signal too much EQ boost can actually cause overload with the accom panying Peak LED warning Be ...

Page 22: ... Here raising or lowering the input level of the channel will affect the send level as well The MPL 1640 also provides three stereo Auxiliary returns These allow you to return signal from outboard devices either in stereo pairs or monophonically many popular effects processors provide a single mono input but have a pair of stereo outputs In practice you ll probably want to use the Auxiliary return...

Page 23: ... and Bus 3 4 inserts are useful when you want to effect the entire mix with a device such as a room equalizer or stereo compressor limiter The Main Mix insert signal is returned just before the Main L R faders and the Bus 3 4 insert signal is returned just before the Bus 3 4 level control All rear panel insert jacks accept 1 4 TRS plugs with the ring carrying the send signal and the tip carrying t...

Page 24: ...ouder or softer than it actually is in the Main Mix Secondly the soloed signal is always monitored monophonically even if it s actually panned off to one side Finally the PFL soloed signal appears without any outboard signal processing being applied via the Aux sends and returns however any signal processing being applied by a channel insert routing is heard Note that there is no provi sion for so...

Page 25: ...e versa CAUTION These servicing instructions are for use by qualified personnel only Refer all servicing to qualified service personnel 23 REMOVE COVERPLATE SCREWS RACKMOUNT ARRANGEMENT REAR FACING JACKFIELD RACKMOUNT EAR JACKFIELD 6 SCREWS COVERPLATE 3 SCREWS REMOVE ARMREST 4 SCREWS TABLETOP ARRANGEMENT REMOVE SCREWS JACKFIELD 6 SCREWS COVERPLATE 3 SCREWS ...

Page 26: ...AUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ON OFF 115V 230V 50 60Hz 42W MAIN MIX OUT BALANCED 600Ω 4dB P O W E R PHANTOM SERIAL NUMBER AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE XLR 1 GND 2 3 MPL 1640 16 CHANNEL AUDIO MIXER TIP RING SLEEVE TIP RING SLEEVE GND ASSEMBLED IN R O K SAMSON TECHNOLOGIES CORP NEW YORK U S A SAMSON L CHANNEL INSERT TIP RET...

Page 27: ...OUVRIR DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE XLR 1 GND 2 3 MPL 1640 16 CHANNEL AUDIO MIXER TIP RING SLEEVE TIP RING SLEEVE GND ASSEMBLED IN R O K SAMSON TECHNOLOGIES CORP NEW YORK U S A SAMSON L CHANNEL INSERT TIP RETURN RING SEND AUX 1 AUX 2 3L 4R MAIN MIX R L AUX 3 AUX 3 AUX 2 AUX 1 AUX RETURN UNBAL 2KΩ 4dB R R R L L L BALANCED 50dB TO 4dB MIC INPUT R 3L 4R UNBAL 2KΩ 4dB BUS INSERT AU...

Page 28: ...2 3 CH 6 1 2 3 CH 7 1 2 3 CH 8 1 2 3 CH 9 1 2 3 CH 10 CH 11 CH 12 CH 13 CH 14 CH 15 CH 16 115 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ON OFF 115V 230V 50 60Hz 42W MAIN MIX OUT BALANCED 600Ω 4dB P O W E R PHANTOM SERIAL NUMBER AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE XLR 1 GND 2 3 MPL 1640 16 CHANNEL AUDIO MIXER TIP RING SLEEVE TIP RING SLEEVE...

Page 29: ...s that it allows you to continuously monitor the signal arriving at the two track tape recorder as opposed to simply monitoring the signals arriving at the MPL 1640 inputs 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 CH 1 CH 2 CH 3 CH 4 CH 5 CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7 CH 8 CH 9 CH 10 CH 11 CH 12 CH 13 CH 14 CH 15 CH 16 ON OFF 1 2 3 CH 6 1 2 3 CH 7 1 2 3 CH 8 1 2 3 CH 9 1 2 3 CH 10 CH 11 CH 12 CH 13 CH 14...

Page 30: ...oltage of the MPL 1640 WARNING Before carrying out this operation remove the power cord 110 110 220 110 220 110 220 1 Insert a small screwdriv er into the hook beneath the fuse sled and pull it out from its retaining clip Hold the hook with your fingers and gently pull the sled out 3 Use a small pair of needlenose pliers to gently pull out the mains jumper 2 Remove fuse sled 4 Use the needlenose p...

Page 31: ...ANCE R L L R R L L OUTPUT R OUTPUT HEADPHONE OUTPUT BALANCED MAIN MIX R OUTPUT BALANCED MAIN MIX L OUTPUT LED LEVEL METER R L AUX 1 AUX 2 AUX 3 L R HEADPHONE VR 3L 4R VR CH2 CH16 RETURN 2 3 POWER SUPPLY 15V 15V GND 8V POWER SW AC INLET FUSE AC INPUT 120V 50 60 HZ A U X 1 A U X 2 A U X 3 P F L L P F L R M A I N L M A I N R 3 L 4 R G N D 1 5 V _ 1 5 V PFL LED PFL SW AUX RETURN ...

Page 32: ...1 Ch 16 110 dB 110 dB Maximum Voltage Gain 5 dB Ch Input 1 kHz output 600 ohm load balanced Mic to Main L R 84 dB Line to Main L R 74 dB Aux Return to Main L R 34 dB Ch Input 1 kHz output unbalanced Mic to 3L 4R 84 dB Line to 3L 4R 74 dB Mic to Aux Send 79 dB Line to Aux Send 69 dB Residual Noise 1 kHz with 30 kHz LPF on all VR min all faders down L R Main Out 95 dB 90 dB 3L 4R Out 89 dB 85 dB Aux...

Page 33: ...ange 15 dB to 80 dB Aux send gain range 10 dB to 75 dB Input Channel Equalization 2 dB High 10 kHz 15 dB Mid 800 Hz 12 dB Low 80 Hz 15 dB Dimensions W x D x H 482 x 373 x 112 mm 19 x 14 7 x 4 4 in Weight 7 kg 15 4 lbs Power Requirements 120 VAC 60 Hz 230 240 VAC 50 60 Hz Power Consumption 42 w 42 w ...

Page 34: ...y On The Right Wavelength for Samson Technologies Corp Copyright 1994 Samson Technologies Corp Printed August 1994 Samson Technologies Corp 262 Duffy Avenue Hicksville NY 11801 Phone 516 932 1062 Fax 516 932 3815 ...

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